---
title: Pattern.use()
---
The `Pattern.use()` method will load a FreeSewing plugin.
Plugins are a way to extend a pattern's functionality.
For more details, refer to [the plugin guide](/guides/plugins/).
:::noteThis method is chainable as it returns the Pattern object:::
## Pattern.use() signature
```js
Pattern pattern.use(object plugin)
// or
Pattern pattern.use(object plugin, object plugin_data)
```
See [the plugin guide](/guides/plugins/) for details on how to structure
you plugin object.
## Pattern.use() example
```js
import { Aaron } from "@freesewing/aaron"
import { pluginTheme } from "@freesewing/plugin-theme"
// Load some public test measurements from the FreeSewing backend
const measurements = (
await (
await fetch("https://backend3.freesewing.org/curated-sets/1.json")
).json()
).measurements
const pattern = new Aaron({ measurements }).use(pluginTheme)
const svg = pattern.draft().render()
```
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